High-pressure gas discharge lamp having tubular electrodes

Details High-pressure gas discharge lamp having tubular electrodes High-pressure gas discharge lamp having tubular electrodes

2004-08-03

2008-09-09

Williams, Joseph (Department: 2879)

Electric lamp and discharge devices

With gas or vapor

Having electrode heated by space discharge current

C313S570000, C313S025000

Reexamination Certificate

active

07423379

ABSTRACT:
A high-pressure discharge lamp has a discharge vessel (10) enclosing a discharge space (11) which contains an ionizable filling. The discharge vessel has a first (2) and a second (3) mutually opposed neck-shaped portion provided with a pair of electrodes (6, 7) arranged in the discharge space (13). Each electrode is tubular over its entire length. Preferably, the electrodes are free from coils in the discharge space. Preferably, the electrodes extend to outside the discharge vessel. The high-pressure discharge lamp according to the invention is relatively easy to manufacture.

REFERENCES:
patent: 2951171 (1960-08-01), Holmes
patent: 3313980 (1967-04-01), Ducati
patent: 3558964 (1971-01-01), White
patent: 3597650 (1971-08-01), Anderson et al.
patent: 3916241 (1975-10-01), Pollard
patent: 4202999 (1980-05-01), Holle et al.
patent: 5994839 (1999-11-01), Yamamoto et al.
patent: 0866488 (1998-09-01), None
patent: 0866488 (1998-09-01), None
patent: 663878 (1951-12-01), None
patent: 4171651 (1992-06-01), None

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